RE: [WM]: Discussion on Printed Paper watermarking

["MARY LYNNE HALLOT" <2370447@uwc.ac.za>]

Message to J. Picard:
Please may I have access to these papers.
Thank you.
Mary-Lynne H'allot;
PhD Student; 
Computer Science Department;
University of the Western Cape
http://www.cs.uwc.ac.za/~charlie/
>>> "Justin Picard" <jpicard@mediasec.com> 10/06/04 11:22 AM >>>
Hi,

There are several advantages of digital watermarking for print security = over the physical methods:
-proven or at least quantifyable security -easier integration in the = workflow (no special ink, security paper, etc.
required)
-machine detection-> high volumes of documents can be verified, e.g. = checks -security feature survives the analog to digital
transition, and can still be verified in a digital version of the document = -automatic (not human-based) detection allows for a
non-fuzzy decision; also remote detection (the image capturing device and = the detector are at different physical locations)

As pointed out by Slava, other technologies that can achieve the same goal = can also be used. A digital watermark is only needed if
the feature needs to be covert, or unperceptible for esthetics reasons.

We discuss these issues in the following two papers that appeared in this = years's Spie. Let me know if you would like a copy of
the
papers:

J. Picard, C Vielhauer and N. Thorwirth
A Fraud-Proof ID card based on multiple data hiding technologies and = biometrics.
\emph{SPIE Electronic Imaging, Security and Watermarking of Multimedia = Contents}, San Jose, 2004.

J. Picard.
Digital Authentication with Copy Detection Patterns.  \emph{SPIE Electronic=  Imaging, Optical Security and Counterfeit Deterrence
Techniques}, San Jose, 2004.


Regards,

Justin Picard


>-----Original Message-----
>From: watermarking-owner@watermarkingworld.org
>[mailto:watermarking-owner@watermarkingworld.org]On Behalf Of 
>Sviatoslav Voloshynovskiy
>Sent: Tuesday, October 05, 2004 5:48 PM
>To: watermarking@watermarkingworld.org
>Subject: Re: [WM]: Discussion on Printed Paper watermarking
>
>
>Hi,
>
>...... several more comments to Miroslav email:
>
>Watermarmarking of printed documents is a very important issue where
>a  lot of things depend on the requirements of a particular
>application  which defines:
>- security requirements;
>- printing/scanning resolution;
>- halftoning/inverse halftoning technique (if you do not use
>continuous 
>tone printing that might be rather expensive for most of applications);
>- embedding rate;
>- special tricks that avoid a possibility of copying or enabling 
>self-authentications and so on;
>- key management protocol;
>- complexity at the detector/decoder side;
>- integration into printing process.
>
>........ so complex.....
>
>If there are not special requirements, one might think just to use 
>simple bar (2D) codes for the same needs simplifying a lot of
>practical 
>problems and providing low-cost solution.
>
>Regards,
>Slava Voloshynovskiy
>
>
>mgoljan@binghamton.edu wrote:
>
>>IMHO, the important issue here is the cost. The second, well, it is 
>>the cost again. The third, we can use math to prove that the digital
>watermark has desired properties.
>>
>>Miroslav Goljan, SUNY Binghamton
>>
>>
>>
>>
>>>Dear all,
>>>If there is many of techniques to watermark paper using physical 
>>>material such as holograms,.... and they are still exist in the paper 
>>>even if the paper is damaged, why we try to find watermarking 
>>>algorithm using digital techniques..even most of theses are week 
>>>after print scan....I would like to know your opinion about the 
>>>importance of digital watermarking for print security over the
>>>physical methods.
>>>Please reply to the the watermark group so we can listen to all 
>>>opinion thanks
>>>
>>>
>>>Khaled Walid Mahmoud
>>>ZPU University
>>>P.O.Box 2000
>>>Zarka - 13110
>>>Jordan
>>>Email
>>>        (work): k.w.mahmoud@zpu.edu.jo
>>>        (Home):kwkmmsy@yahoo.com



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